n. A number of things, as fruits, growing naturally together; a bunch, particularly ot grapes or other fruit growing similarly.n. A number of persons or things of any kind collected or gathered into a close body; a nearly conjoined group or collection: as, a cluster of islands.To form or constitute a cluster or clusters; grow or be placed in clusters or groups; gather in a group or groups.To collect into a cluster or group.To produce in a cluster or clusters.To cover with clusters.